Lock and unlock your Smart phone or tablet quickly, hide the app when you leave your smart phone alone
Water Resistant and No charging required ; Uses: set up smart lock, card recharge, smart phone unlock, phone important file lock, transfer files.
Control Applications (you can write a fixed process list ahead of the time, and the ring will start the applications each time by simply touch.
Share & Transfer information (send the private message/Picture/business card/ website link to the person you want to share by a simple touch)
Support All Android and Windows NFC Mobiles. Size Chart please check the image